Wis. Stat. § 24.02: Addition to the public lands.

Addition to any class of lands specified in s. 24.01, except lands purchased for forest reserve and Marathon County lands, may be effected by grant, conveyance or devise made as a donation to the state for the purpose of the fund to which such class belongs. But no such proffered donation shall be accepted until the title of the donor has been examined and approved by the attorney general.